The effect of tungsten content on the rolling texture and microstructure of Ta-W alloys

Wang, S.; Wu, Zhan; Xie, Miao; Si, Dinh; Li, L.Y.; Chen, C.; Zhang, Z.; Wu, You

doi:10.1016/j.matchar.2019.110067

Cited by 24 publications

(13 citation statements)

References 32 publications

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“…However, a recent study on Texture evolution during the deformation processing of BCC metals involves the formation of three primary fiber textures: (i) α-fiber containing <110> parallel to the rolling direction with {001}<110>, {112}<110>, and {111}<110> orientations, (ii) γ-fiber containing <111> parallel to the normal direction with {111}<110> and {111}<112> orientations, and (iii) θ-fiber containing <001> parallel to the to the normal direction with {001}<110> and {001}<100> orientations [73]. Simulations employing a Taylor-type grain interaction model have shown that αand γ-fiber textures emerge when slip is constrained to the {110}, {112}, and {123} planes all along the <111> direction [74] and is consistent with experimentally determined fiber textures in BCC transition metals [75][76][77]. However, a recent study on unidirectionally cold-rolled W indicated that the γ-fiber was accompanied by both a Goss texture with (011)<110> orientation and θ-fiber with {001}<100> orientation, both of which peaked at 80% reduction prior to the γ-fiber becoming dominant at 90% [78].…”

Section: Texture Evolution and Its Implications For Powder Morphologiessupporting

confidence: 77%

Microstructural Transitions during Powder Metallurgical Processing of Solute Stabilized Nanostructured Tungsten Alloys

Olynik

Cheng

Sprouster

et al. 2022

Metals

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Exploiting grain boundary engineering in the design of alloys for extreme environments provides a promising pathway for enhancing performance relative to coarse-grained counterparts. Due to its attractive properties as a plasma facing material for fusion devices, tungsten presents an opportunity to exploit this approach in addressing the significant materials challenges imposed by the fusion environment. Here, we employ a ternary alloy design approach for stabilizing W against recrystallization and grain growth while simultaneously enhancing its manufacturability through powder metallurgical processing. Mechanical alloying and grain refinement in W-10 at.% Ti-(10,20) at.% Cr alloys are accomplished through high-energy ball milling with transitions in the microstructure mapped as a function of milling time. We demonstrate the multi-modal nature of the resulting nanocrystalline grain structure and its stability up to 1300 °C with the coarser grain size population correlated to transitions in crystallographic texture that result from the preferred slip systems in BCC W. Field-assisted sintering is employed to consolidate the alloy powders into bulk samples, which, due to the deliberately designed compositional features, are shown to retain ultrafine grain structures despite the presence of minor carbides formed during sintering due to carbon impurities in the ball-milled powders.

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Section: Texture Evolution and Its Implications For Powder Morphologiessupporting

confidence: 77%

Microstructural Transitions during Powder Metallurgical Processing of Solute Stabilized Nanostructured Tungsten Alloys

Olynik

Cheng

Sprouster

et al. 2022

Metals

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“…CR alloys with fine grains exhibit a higher intensity of γ-fiber texture compared with the CR alloy with coarse grains and this texture is primarily composed of micro-bands. Wang et al [88] discussed the microstructural and texture variation in Ta-2.5W and Ta-10W alloy samples. The activation of different slip systems during CR was reported to result in varying deformation textures.…”

Section: Deformed Microstructure and Texture Evolutionmentioning

confidence: 99%

Evolution of Microstructure and Crystallographic Texture in Deformed and Annealed BCC Metals and Alloys: A Review

Tandon,

Park,

Khatirkar

et al. 2024

Metals

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Dislocation slips, twinning, shear banding (SBs), strain localization, and martensite formation are a few deformation modes that are activated in BCC metals and alloys. Strain, strain rate, and deformation temperature are other parameters that determine the activation of deformation modes in BCC alloys. This review focuses on several BCC alloys, such as beta-titanium (β-Ti), tantalum (Ta), and ferritic stainless steels (FSSs), all of which exhibit differences in deformation behavior. These alloys often undergo thermo-mechanical processing (TMP) to enhance their mechanical properties. TMP leads to the evolution of deformation-induced products, such as SBs, strain-induced martensite (SIM), strain localizations, and mechanical/deformation twins (DTs) during plastic deformation, while also influencing crystallographic texture. The deformation modes in β-Ti depend upon the stability of the β-phase (i.e., β-stabilizers); low-stability alloys show the formation of SIM along with slips and twins, whereas in highly stable β-Ti alloys, only slip+twin modes are observed as the primary deformation mechanisms. In the case of Ta, slip activity predominantly occurs on {110} planes, but it can also occur on planes with the highest resolved shear stress. The breakdown of Schmid’s law or non-Schmid behavior for Ta and Ta-W alloys has been discussed in detail. The cold rolling (CR) of FSSs results in the formation of ridges, which is an undesirable phenomenon leading to very low formability. The microstructures of the rolled sheets consist of elongated ferrite grains with in-grain SBs, which are preferentially formed in the γ-fiber-oriented grains. The formation of finer grains after recrystallization improves both the mechanical properties and ridging resistance in FSS. Therefore, this review comprehensively reports on the impact of TMP on the microstructural and crystallographic texture evolution during the plastic deformation and annealing treatment of β-Ti, Ta alloys, and FSSs in BCC materials, using results obtained from electron microscopy and X-ray diffraction.

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“…Most research was done on Ni-based and Fe-based alloys [17][18][19][20][21]. For transition metal alloys from groups V and VI, most studies concerned the mechanical and thermodynamic properties of ternary or quaternary alloy systems [12,[22][23][24][25]. There is a significant knowledge gap for random binary alloys comprising group V and VI metals.…”

Section: Introductionmentioning

confidence: 99%

Comparing interatomic potentials in calculating basic structural parameters and Peierls stress in tungsten-based random binary alloys

Mamun,

Xu,

et al. 2023

Phys. Scr.

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The field of machine learning-based interatomic potentials (ML-IAPs) has seen increasing development in recent years. In this work, we compare three widely used ML-IAPs–the moment tensor potential (MTP), the spectral neighbor analysis potential (SNAP), and the tabulated Gaussian approximation potential (tabGAP)with a conventional non-ML-IAP, the embedded atom method (EAM) potential. We evaluated these potentials on the basis of their accuracy and efficiency in determining basic structural parameters and Peierls stress under equivalent conditions. Three tungsten (W)-based alloys (Mo-W, Nb-W, and Ta-W) are considered, and their lattice parameter, formation energy, elastic tensor, and Peierls stress of edge dislocation are calculated. Compared with DFT results, MTP demonstrates the highest accuracy in predicting the lattice parameter and the best computational efficiency among the three ML-IAPs, while tabGAP accurately predicts two independent elastic constants, C 11 and C 12. Despite being the slowest, SNAP shows the highest accuracy in predicting the third independent elastic constant C 44 and its Peierls stress value is comparable to that based on MTP.

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The effect of tungsten content on the rolling texture and microstructure of Ta-W alloys

Cited by 24 publications

References 32 publications

Microstructural Transitions during Powder Metallurgical Processing of Solute Stabilized Nanostructured Tungsten Alloys

Microstructural Transitions during Powder Metallurgical Processing of Solute Stabilized Nanostructured Tungsten Alloys

Evolution of Microstructure and Crystallographic Texture in Deformed and Annealed BCC Metals and Alloys: A Review

Comparing interatomic potentials in calculating basic structural parameters and Peierls stress in tungsten-based random binary alloys

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